A wiring diagram is a straightforward visual representation of the physical connections and physical layout of your electrical system or circuit. It shows how the electrical wires are interconnected and will also show where fixtures and components may be coupled to the system.

When and How to Use a Wiring Diagram

Use wiring diagrams to help in building or manufacturing the circuit or computer. They are also a good choice for making repairs.

DIY enthusiasts use wiring diagrams however they are also common in home based building and auto repair.

For example, a property builder should what is place of business of electrical outlets and light fixtures using a wiring diagram to stop costly mistakes and building code violations.

How is a Wiring Diagram Different from the Schematic?

A schematic shows the plan and function to have an electrical circuit, but is not interested in the physical layout in the wires. Wiring diagrams show how the wires are connected and where they must found in the actual device, as well as the physical connections between every one of the components.

How is a Wiring Diagram Different coming from a Pictorial Diagram?

Unlike a pictorial diagram, a wiring diagram uses abstract or simplified shapes and lines showing components. Pictorial diagrams tend to be photos with labels or highly-detailed drawings of the physical components.

Standard Wiring Diagram Symbols

If a line touching another line includes a black dot, it implies the lines are connected. When unconnected lines are shown crossing, you will see a line hop.

Most symbols used on a wiring diagram seem like abstract versions from the real objects they represent. For example, a switch will be a burglary the fishing line which has a line with an angle to the wire, just like a light switch you’ll be able to flip on and off. A resistor will be represented with a series of squiggles symbolizing the restriction of current flow. An antenna can be a straight line with three small lines branching off at its end, just like a real antenna.

Wiring diagram symbols

Wire, conducts current

Fuse, disconnect when current exceeds some amount

Capacitor, employed to store electric charge

Toggle Switch, stops the flow of current when open

Push Button Switch, momentarily allows current flow when button is pushed in, breaks current when released

Battery, stores electric charge and generates a relentless voltage

Resistor, restricts current flow

Ground wire, employed for protection

Circuit breaker, utilized to protect a circuit from an overload of current

Inductor, a coil that generates a magnetic field

Antenna, transmits and receives radio waves

Surge protector, used to protect a circuit from a spike in voltage

Lamp, generates light when current flows through

Diode, allows current circulation in one direction indicated by an arrowhead or triangle on the wire